Browsing Doctoral theses (VetMed) by Issue Date
Now showing items 61-80 of 129
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Production of Atlantic salmon (Salmo salar) in closed confinement systems (CCS) : salmon lice, growth rates, mortality and fish welfare
(PhD Thesis;2019:48, Doctoral thesis, 2019)Farming of Atlantic salmon have been in rapid growth since the 1970's and is now an important industry in many countries around the North Atlantic as well as Chile. Since 2000, all countries with farming of Atlantic salmon ... -
Molecular characterization of Piscine orthoreovirus (PRV) and its pathogenesis in salmonids
(PhD Thesis;2019:79, Doctoral thesis, 2019)Piscine orthoreovirus (PRV) is a virus of salmonid fish. PRV has been associated with different diseases in various salmonid fish species, including heart and skeletal muscle inflammation (HSMI) in Atlantic salmon and more ... -
Epidemiologic studies of bovine respiratory syncytial virus and bovine coronavirus in Norway
(PhD Thesis;2019:32, Doctoral thesis, 2019)Bovine respiratory syncytial virus (BRSV) and bovine coronavirus (BCV) cause respiratory infection in cattle worldwide. In addition, BCV also causes diarrhoea in calves and contagious diarrhoea in adult cows, i.e. winter ... -
Comparative study of challenge models to evaluate protection after immunization with Piscirickettsia salmonis
(PhD Thesis;2019:75, Doctoral thesis, 2019)The Chilean salmon industry is considered one of the most important aquaculture industries worldwide, only bypassed by Norway. In Chile, salmon represents the second-biggest export product after copper. Due to the fast ... -
Use of a One Health approach for understanding the epidemiology and management of anthrax outbreaks in the human-livestock-wildlife and environmental health interface areas of Northern Tanzania
(PhD thesis;2019:24, Doctoral thesis, 2019)Zoonotic diseases are infections, which are transmissible between animals and humans. In both low and middle-income countries (LMIC), animals (livestock or wildlife) and humans often live close together. In LMIC, people ... -
Persistent Organic Pollutants (POPs) and heavy metals in fish from Tanzania : levels and associated health risks to humans and fish
(PhD Thesis;2019:17, Doctoral thesis, 2019)Diet is considered as the main route of exposure to pollutants such as persistent organic pollutants (POPs) and heavy metals to humans during lifetime. POPs and heavy metals are both persistent and can bioaccumulate in the ... -
Epidemiology of orthopaedic conditions in companion animals with emphasis on cranial cruciate ligament disease
(PhD Thesis;2019:78, Doctoral thesis, 2019)Lameness caused by orthopaedic disease is an important reason for owners to take their dog or cat to the veterinarian. Many diagnoses, such as cranial cruciate ligament disease (CCLD), considered the most common cause of ... -
Medaka (Oryzias latipes) gonadotropins : production and developmental profiles, pharmacological characterization of their receptors, and establishment of a novel transgenic line tg(fshb:DsRed2)
(PhD Thesis;2019:6, Doctoral thesis, 2019)The gonadotropins, follicle-stimulating hormone (Fsh) and luteinizing hormone (Lh), produced in gonadotrope cells of the pituitary, possess key roles in the endocrine control of vertebrate puberty and reproduction as part ... -
Exploring physiological functions of the prion protein in a new animal model
(PhD Thesis;2019:35, Doctoral thesis, 2019)The cellular prion protein (PrPC) has been intensively studied for its role in the pathogenesis of transmissible spongiform encephalopathies, such as Creutzfeldt-Jakob disease in human, bovine spongiform encephalopathy in ... -
Reproductive potential and quality of SpermVital semen used for artificial insemination in cattle
(PhD thesis;2020:17, Doctoral thesis, 2020)Utfallet av kunstig sædoverføring (KS) avhenger av flere faktorer, blant annet sædkvalitet, metoden for sædprosessering og miljøet i kjønnsorganet hos det inseminerte hunndyret. Vellykket KS hos storfe krever også riktig ... -
NDRG1 and PrPC in peripheral nerve myelin maintenance : insights from morphological studies in two unique animal models
(PhD Thesis;2020:28, Doctoral thesis, 2020)Peripheral nerves transmit signals between peripheral tissue and the central nervous system, essential for normal motor and sensory function. To enable this, the integrity of both the axon and Schwann cell is crucial. The ... -
New genomics and transcriptomics tools toward improving conservation strategies for sturgeons
(PhD Thesis;2020:12, Doctoral thesis, 2020)Sturgeons (Family Acipenseridae) are one of the largest and most primitive fish families on Earth. Although they have always been typically distributed throughout the Northern Hemisphere, during the last decades wild ... -
The applicability of milking-time testing in automatic milking systems
(PhD Thesis;2020:5, Doctoral thesis, 2020)Norsk mjølkeproduksjon forandrer seg i retning større produksjonsenheter, økende bruk av automatiske mjølkingssystemer (AMS) og reduserte økonomiske marginer. Til tross for at situasjonen har forbedret seg kraftig de siste ... -
Antibiotic resistance in wastewater
(PhD Thesis;2020:9, Doctoral thesis, 2020)Antibiotic resistance is a characteristic possessed by some bacteria that enables them to withstand the effects of antibiotic treatment. Antibiotic use and abuse may result in development of antibiotic resistant bacteria. ... -
Using online cell counts for detection and prediction of subclinical intramammary infections in dairy cows
(PhD Thesis;2020:14, Doctoral thesis, 2020)Mastitis is an inflammation of the mammary gland that can result in an elevated somatic cell count (SCC). It is mainly caused by intramammary infections (IMI). Cows with mastitis can have clinical signs (clinical mastitis) ... -
Effects of the brain-infecting parasite Pseudoloma neurophilia in laboratory zebrafish (Danio rerio)
(PhD thesis;2020:40, Doctoral thesis, 2020)Zebrafish (Danio rerio) are increasingly popular model animals in scientific fields ranging from behavioural ecology to neurobiology. It is therefore of increasing concern that half of all zebrafish research facilities are ... -
Persistent organic pollutants and effects on developmental and functional processes in mice
(PhD Thesis;2020:45, Doctoral thesis, 2020)Initial exposure to persistent organic pollutants (POPs) occurs by placental and lactational transfer during fetal and neonatal life and continues during the adult stage through ingestion, inhalation and dermal absorption. ... -
Genetic variation in Norwegian cervids : relevance to the occurrence of Chronic Wasting Disease (CWD)
(PhD Thesis;2021:51, Doctoral thesis, 2020)The etiological agents’ nature has a pivotal role in the pathogenesis of infectious diseases. Prion diseases are unique in having a misfolded protein (PrPSc) as the sole transmissible agent. The host cellular protein (PrPC) ... -
Plant-based aquafeeds : carry-over potential of mycotoxins and phytoestrogens from feed to fish and implication for fish health and food safety
(PhD Thesis;2020:62, Doctoral thesis, 2020)The introduction of novel feed ingredients has brought tremendous changes in the field of aquaculture. The shift to non-marine resources was necessary because of rising prices for fish meal and fish oil and their decreasing ... -
Quinolone resistant Escherichia coli in Norwegian livestock : a comparative genomics study
(PhD Thesis;2020:16, Doctoral thesis, 2020)The occurrence of antimicrobial resistance in Norwegian livestock is generally low. This is a consequence of good animal health and welfare, which reduces the need for antimicrobial use. Quinolones are important antimicrobial ...